Floyd was down for several minutes in the third quarter of San Diego's 33-30 win after he was wrapped up from behind by safety Nate Allen and had his head driven into charging linebacker DeMeco Ryans.

Floyd immediately went down on the incomplete pass and players from both teams took a knee around him. Team doctors from both sides tended to Floyd before he was put on a stretcher and wheeled off the field.

''He's doing fine,'' coach Mike McCoy said. ''All the tests right now look good. It's great for the organization to go out and get a win for Malcom. I'll leave it at that and update you as time goes on.''

Floyd had five catches for 102 yards before the injury.

The Colts suffered their second significant injury of the week when left guard Donald Thomas tore a quad tendon in his right leg in Indianapolis' loss to Miami. He will likely miss the rest of the season. Colts coach Chuck Pagano said Thomas will need to have surgery.

It's yet another big blow for a team that also lost starting running back Vick Ballard this week with a torn anterior cruciate ligament in his right knee.

Carolina's already young and inexperienced defensive secondary is suddenly being hit by injuries.

Ewing, who couldn't put weight on his right leg, left the field on a cart. Weatherspoon, Ewing, Biermann, Samuel and Jackson - all starters - did not return to the sideline for the second half.

Rams safety Matt Daniels was carted off the field with his right ankle in a splint in the first quarter and did not return.

San Francisco lost starting nose tackle Ian Williams to a leg injury in the first quarter against Seattle and safety Eric Reid to a concussion in the second quarter.

Williams was injured when he was being cut block by J.R. Sweezy and his left ankle was caught underneath as Sweezy made the block on a 2-yard run by Marshawn Lynch.

Reid was injured when he came up to hit Sidney Rice on a completion across the middle.

Also, Seattle starting left tackle Russell Okung was injured on the final play of the first quarter, suffering a left foot injury. He limped off the field and was later taken to the locker room on a cart to be examined. He returned to the sideline but was a spectator.